Eudialyte and Ettringite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
H 2 SO 4
  
Partially soluble in water
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.74-3.00
  
1.77
  
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009)
  
Not Available
  
Cleavage
Distinct on {0001} imperfect on {11 2 0}
  
Perfect on {10 1 0}
  
Mohs Hardness
5-5.5
  
2-2.5
  
Chemical Composition
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
  
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Eudialyte and Ettringite Chemical Formula
While comparing Eudialyte and Ettringite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Eudialyte and Ettringite chemical formula.
- Chemical formula of Eudialyte- Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Eudialyte and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Eudialyte and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Eudialyte and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Eudialyte is 1.77 whereas that of Ettringite is 1.77.